Compiler Loop Optimizations

Tim Frink <>
28 Feb 2008 21:46:04 GMT

          From comp.compilers

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From: Tim Frink <>
Newsgroups: comp.compilers
Date: 28 Feb 2008 21:46:04 GMT
Organization: Compilers Central
Keywords: optimize, question
Posted-Date: 29 Feb 2008 01:21:03 EST


I'd like to know your experiences with compiler loop optimizations.

What loop optimizations (in your opinion) can be applied to a large
number of programs and yield a (significant) improvement of the
program run-time?

I've tested the compiler optimization "loop unswitching" (also
introduced in gcc 3.4) but going through a large number of different
benchmarks I could find very few examples where the optimization could
be applied. Do you share my experience?


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